*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19930
19940
19950
19960
19970
19980
19991
20000
20011
20020
20031
20043
20052
20062
20071
20085
20091
201028
20115
20126
20132
20141
20150
20160
20173
20184
20198
20204
20216
20226
20232
20241
Total94